File browser integration: adding own scripts depending on tab instead of dialog window type

Hi,

I have a question about the file browser integration in CkEditor version 4.4.5

I'd like to configure a separate url for the "Browse Server" button depending on which tab is active (or on which tab the button is clicked).
On http://docs.ckeditor.com/#!/guide/dev_file_browse_upload i just found an example (number 2) for setting a separate url for each dialog window type.

Is there a possiblity to configurate this for each tab or to get the information on which tab the button was clicked?

Thanks